Protective paper for photographic material



Jan. 1, 1935.

A. MILLER 86,228 PROTECTIVE PAPER FOR PH OTOGRAPHIC MATERIAL Filed Oct. 12, 1931 Inven foi':

Patented Jan. 1, 1935 PATENT OFFICE PROTECTIVE PAPER FOR PHOTOGRAPHIC MATERIAL Alfred Miller, Dessau, Germany, assignor to Agfa Ansco Corporation, Binghamton, N. Y., acorporation of New York Application October 12, 1931, Serial No. 568,528 In Germany October 13, 1930 2 Claims.

My present invention relates to protective paper for photographic material.

One of its objects is such a protective paper provided with an inscription well recognizable in the dark room illumination. Further objects will be seen from the detailed specification following hereafter.-

As a rule, papers for protecting photographic materials, especially protective paper strips for roll films, draw tabs of film pack, etc. bear inscriptions such as notes of advertisement, numbers, etc. Since the protective papers are usually dyed in black and are manipulated in the very faint red or green dark-room illumination, these inscriptions, in general, can be discerned with difliculty only or cannot be discerned at all.

According to my invention inscriptions which are well recognizable in the dark room illumination are prepared by changing the light reflection of the paper surface at the areas covered by the inscription from that of the remaining paper surface. This alteration can be effected by embossing the backing paper, so that the inscription forms a relief and similar operations. By these means the uniform surface of the paper is rendered irregular in the places, subjected to the treatment which fact involves the desired alteration of light reflection. Very well visible are, for instance, changes operated by finely graining, for instance, by pyramidal graining, as sometimes applied for photographic papers in order to produce artistic efiects.

The best effect is obtained by embossing the backing paper atthe areas to be occupied by the inscription or numeral and moreover applying a pyramidal graining to the embossed areas.

Reference is now made to the accompanying drawing in which Fig. 1 represents aplan film provided with a backing paper Figs. 2 and 3 a section of the backing paper of Fig. l on the line 2-2.

In Fig. 1 there is represented a plan film provided with a backing paper as usual in film packs. The backing paper bears the numeral 6. Figs. 2 and 3 show two modes of applying the numerals to the backing paper. In Fig. 2 there is shown the preferred embodiment of my invention the number being embossed and the embossed paper surface being provided with a pyramidal graining. Fig. 3 shows the embodiment wherein only a pyramidal graining has been applied to the paper surface at the areas to be occupied by the numeral. It is obvious that letters or inscriptions may be applied in the same manner.

My new method of applying inscriptions may not only be utilized for draw tabs of film packs and protective paper strips for roll films, but also for all other papers and card-boards the inscriptions of which shall be legible in dark room illumination.

Furthermore the inscriptions according to my invention are distinguished by the fact that the light sensitive emulsion is not in the least affected by them.

What I claim is:-

1. A 'protective paper for photographic mate- .rials with an inscription or marks comprising areas of the paper surface to which a pyramidal graining has been applied.

2. A protective paper forphotographlc mate rials with an inscription or marks comprising embossed areas of the paper surface, said embossed areas being provided with a pyramidal graining.

ALFRED MILLER. 

